Prepare for the Automotive Service Technician Period 1 exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which list contains the factors that determine resistance?

Resistance is determined by how long the current has to travel, how thick the conductor is, what material the conductor is made of, and how temperature affects that material. The relationship is captured by R = ρL/A, where R is resistance, ρ is resistivity, L is length, and A is cross-sectional area. Longer length increases resistance, a larger cross-sectional area lowers it, and the resistivity ρ varies with material and temperature. So length, cross-sectional area, temperature, and material type are the factors that determine resistance. The other options mix properties that don’t set resistance (like density, humidity, texture) or relate to electrical quantities rather than determinants of resistance (voltage, current, power).

Resistance is determined by how long the current has to travel, how thick the conductor is, what material the conductor is made of, and how temperature affects that material. The relationship is captured by R = ρL/A, where R is resistance, ρ is resistivity, L is length, and A is cross-sectional area. Longer length increases resistance, a larger cross-sectional area lowers it, and the resistivity ρ varies with material and temperature. So length, cross-sectional area, temperature, and material type are the factors that determine resistance. The other options mix properties that don’t set resistance (like density, humidity, texture) or relate to electrical quantities rather than determinants of resistance (voltage, current, power).